... ; 3. Convenient operation; 4. High efficiency. Spiral Grader1. Usage: Spiral Grader is one of the most widely used mechanical grading equipment ... used in desliming, dehydration of ore washing.2. Structure: Spiral Grader is consist of driving device, spiral, flume, lifting device, lubrication ... (pcs)Y100l-42.22(pcs)12670×3368×488827.4 Spiral Grader